Malicious PDF — malware analysis report

Static analysis result for SHA-256 60d918f07aa909ec…

MALICIOUS

PDF

71.5 KB Created: 2021-02-20 22:17:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-16
MD5: 269b2e24849f2b470a13c07c56623524 SHA-1: 2d24cb63e4f949ebfeaf221e647f4fc5a34e4fd4 SHA-256: 60d918f07aa909ec59357a2fd3ab6b1458f6f5f6b4021b7c99cced55f1ca9df7
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a significant number of external links, many hosted on disposable domains, indicating a link farm or phishing attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were extracted, the PDF structure and embedded URLs point towards a malicious document designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://bologen.ru/123?utm_term=how+to+make+money+investing+in+stocks+reddit PDF link annotation
    • http://helplnstagramcontact5087423.com/desibuduloduboliwipuvivu0qylq.pdfIn PDF document text
    • https://cdn.sqhk.co/kunimoxifagi/dheWghn/zifikelegivikupesiza.pdfIn PDF document text
    • https://rolorizumi.weebly.com/uploads/1/3/4/3/134316308/e55376f2d259.pdfIn PDF document text
    • https://cdn.sqhk.co/tajavujexiz/YTjetXl/powinulabosabifewawen.pdfIn PDF document text
    • http://brumbum6.xyz/basic_engineering_circuit_analysis_190hld.pdfIn PDF document text
    • http://quinzsy-studio.design/bram_stokers_dracula_film_wikipediamj8t8.pdfIn PDF document text
    • https://cdn.sqhk.co/bezupidokaz/XK0Ux5B/anti_stress_relaxation_toys.pdfIn PDF document text
    • http://bluebadge-support.com/agentes_y_apoderados_aduanalesgnvhm.pdfIn PDF document text
    • http://lnstagram-helping-centre.com/wurapazubilabofewuwar4sh2.pdfIn PDF document text
    • https://cdn.sqhk.co/vomikigiw/Mhqwhio/kagaxofig.pdfIn PDF document text
    • http://hookup158.fun/monster_vs_zombietjiod.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413457/normal_601a7fb2d67a8.pdfIn PDF document text
    • http://decideyouself.fun/learning_theories_behaviorism_cognitivism_constructivism_humanismajcpg.pdfIn PDF document text
    • https://todoxaladavefuk.weebly.com/uploads/1/3/4/5/134529573/buruke.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://guruwemuzotal.epizy.com/breathing_techniques_during_labour.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d87e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD87E 5504 bytes
SHA-256: cc2391c33f596b7487378cc94ce7d102cd07f3cc93f59edfc638d9366e660d83
font_01_sfnt_off0000eb3d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB3D 10868 bytes
SHA-256: 59aa5b85c90e7368f4aa3c3bef5250daa99e993833cbf68c57c72aaeaebc48cb

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